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Maybe not. On page 58 of the 1958 photo album, we find the same photo of Ms. Lusk, with the same calendar. Perhaps the photo was taken in 1953? Also, I got one of the possible years wrong; it would be

Interesting story, I find this statement a little humerous: "In late 2012 a dog next door bit my wife and I needed a scope"

Hello: I have the opportunity to buy one of these far below the list price. I wonder if anyone has used this DMM, and what were your impressions of it> While I know it is not a Keithly, it seems like

Nicely spotted. Pretty good if it's 1943, thats before the company existed. Don Black.

Ah, Dave, But the electrical system in the US is grounded. What you are referring to is the ability for the GFCI to work without the presence of a ground conductor attached to the GFCI. The electrical

Thanks. Seems right. -Kurt

Looking at picking up a Tek 475M oscilloscope locally.? Anybody know how it differs from a regular 475?? Is it just the military model?? Are the specifications the same as the plain 475?? Any

wrote: A T-connector with a termination on one end will work for oscilloscopes that lack internal switchable terminations which generally only have a bandwidth that extends to 100 MHz anyway. Jim

What I think is happening is the control grid circuit is rectifying the positive input peaks to set the bias. A JFET replacement would operate in the same way although I may have to change the grid

As I gather up all the stuff I need to test and maintain my newly purchased 2235 I am wondering how necessary it is to use a 50 ohm feedthru termination when sending test and calibration signals into

I see calendars on (PDF) pages 32, 56, 82, 88, and 112. I can't make out a year in any of the photos, but the one on page 56 appears to be from December, with Christmas on a Friday. This would suggest

R969, 0.25 Ohm. Albert

Don't worry, there was no attachment, comes from something wrong with my mail. Fabio.

It's the isolated type, outer bus wired to GND via a << 1 Ohm resistor. That resistor sits nearly against the bottom panel of the 'scope. I guess that resistor is broken. Albert

Is the 547 "CAL OUT" connector from the calibrator supposed to be a normal BNC? According to the schematic it is. But on my 547 it's a "floating" BNC, with the barrel separated from the flange with a

Here is another photo album similar to the one I posted before. http://w140.com/undated_tek_photo_album.pdf Can anybody figure out the date of this one? thanks, -Kurt

Sorry, Yahoo seems to be blocking the image, won't accept my login without multiple layers of entering captcha codes, and generally being such a pain to use that its not worth it.

Wow - that means the grid currents must be over -100 uA to get that much on 100k grid leak resistors. I don't recall what the screens were hooked to, but I think you should calculate the screen

Sorry for the attachment, probably I messed up with html/text in mail... Fabio.

Hello Peter, excellent work, my 7704A had many contacts bent or broken, they are thin, fortunately the broken pins were not many. There are many unused pins on the connector (on the 7704A at least)